Abstract
This chapter demonstrates the feasibility of a QD-based memory to replace today’s Flash and dynamic random access memory (DRAM). A novel memory concept based on QDs is presented, enabling very fast write times below picoseconds, only limited by the charge carrier relaxation time. A thermal activation energy of 710 meV for hole emission from InAs/GaAs QDs across an Al0.9Ga0.1As barrier is determined by using time-resolved capacitance spectroscopy. A hole storage time of 1.6 seconds at room temperature is measured, three orders of magnitude longer than the typical DRAM refresh time. In addition, the dependence of the hole storage time in different III–V QDs on their localization energy is determined and a retention time of more than 10 years in (In)(Ga)Sb/AlAs QDs is predicted. Therefore, a future QD-based memory will show improved performance in comparison to both DRAM and Flash having fast write/read times and good endurance.
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References
G.E. Moore, Electronics 38 (1965)
International Roadmap for Semiconductors (2005 edn., January 2006)
T. Müller, F.F. Schrey, G. Strasser, K. Unterrainer, Appl. Phys. Lett. 83, 3572 (2003)
M. Geller, A. Marent, E. Stock, A.E. Zubkov, I.S. Shulgunova, A.V. Solomonov, D. Bimberg, Appl. Phys. Lett. 89, 232105 (2006)
M. Geller, A. Marent, D. Bimberg, Speicherzelle und Verfahren zum Speichern von Daten. German patent application Nr. 10 2006 059 110.0 (27.10.2006)
L. Geppert, IEEE Spectrum 49 (March 2003)
S.M. Sze, in Future Trends in Microelectronics, ed. by S. Luryi, J. Xu, A. Zaslavsky (Wiley, New York, 1999), p. 291
H. Mizuta, Single- and few-electron memories, in 12th Japanese–German IT Forum, 1998
D.V. Lang, J. Appl. Phys. 45, 3023 (1974)
P. Blood, J.W. Orton, The Electrical Characterization of Semiconductors: Majority Carriers and Electron States (Academic, London, 1992)
C.M.A. Kapteyn, F. Heinrichsdorff, O. Stier, R. Heitz, M. Grundmann, N.D. Zakharov, D. Bimberg, P. Werner, Phys. Rev. B 60, 14265 (1999)
C.M.A. Kapteyn, M. Lion, R. Heitz, D. Bimberg, P.N. Brunkov, B.V. Volovik, S.G. Konnikov, A.R. Kovsh, V.M. Ustinov, Appl. Phys. Lett. 76, 1573 (2000)
C.M.A. Kapteyn, M. Lion, R. Heitz, D. Bimberg, C. Miesner, T. Asperger, G. Abstreiter, Appl. Phys. Lett. 77, 4169 (2000)
M. Geller, C. Kapteyn, L. Müller-Kirsch, R. Heitz, D. Bimberg, Appl. Phys. Lett. 82, 2706 (2003)
C. Kapteyn, Carrier Emission and Electronic Properties of Self-Organized Semiconductor Quantum Dots (Mensch & Buch, Berlin, 2001) [Dissertation, Technische Universität Berlin]
M. Geller, E. Stock, R.L. Sellin, D. Bimberg, Physica E 32, 171 (2006)
M. Geller, E. Stock, C. Kapteyn, R.L. Sellin, D. Bimberg, Phys. Rev. B 73, 205331 (2006)
O. Stier, M. Grundmann, D. Bimberg, Phys. Rev. B 59, 5688 (1999)
P.N. Brunkov, A.R. Kovsh, V.M. Ustinov, Y.G. Musikhin, N.N. Ledentsov, S.G. Konnikov, A. Polimeni, A. Patanè, P.C. Main, L. Eaves, C.M.A. Kapteyn, J. Electron. Mater. 28, 486 (1999)
F. Hatami, M. Grundmann, N.N. Ledentsov, F. Heinrichsdorff, R. Heitz, J. Böhrer, D. Bimberg, S.S. Ruvimov, P. Werner, V.M. Ustinov, P.S. Kop’ev, Z.I. Alferov, Phys. Rev. B 57, 4635 (1998)
L. Müller-Kirsch, R. Heitz, U.W. Pohl, D. Bimberg, Appl. Phys. Lett. 79, 1027 (2001)
A. Marent, M. Geller, D. Bimberg, A.P. Vasi’ev, E.S. Semenova, A.E. Zhukov, V.M. Ustinov, Appl. Phys. Lett. 89, 072103 (2006)
J. Batey, S.L. Wright, J. Appl. Phys. 59, 200 (1986)
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Geller, M., Marent, A. (2008). Quantum Dots for Memories. In: Bimberg, D. (eds) Semiconductor Nanostructures. NanoScience and Technology. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-77899-8_11
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DOI: https://doi.org/10.1007/978-3-540-77899-8_11
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